Dichotomy of Reductive Addition of Amines to Cyclopropyl Ketones vs Pyrrolidine Synthesis
作者:Oleg I. Afanasyev、Alexey A. Tsygankov、Dmitry L. Usanov、Denis Chusov
DOI:10.1021/acs.orglett.6b02945
日期:2016.11.18
interesting catalytic dichotomy was discovered: switching between simple ligand-free catalysts leads to fundamentally different outcomes of reductive reaction between amines and α-carbonylcyclopropanes. Whereas a rhodium catalyst leads to the traditional reductive amination product, ruthenium catalysis enables a novel reaction of pyrrolidine synthesis via ring expansion. The protocols do not require an